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Commit | Line | Data |
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921a3d4d | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
fa60ce2c | 2 | /* |
ccd979bd MF |
3 | * extent_map.h |
4 | * | |
5 | * In-memory file extent mappings for OCFS2. | |
6 | * | |
7 | * Copyright (C) 2004 Oracle. All rights reserved. | |
ccd979bd MF |
8 | */ |
9 | ||
10 | #ifndef _EXTENT_MAP_H | |
11 | #define _EXTENT_MAP_H | |
12 | ||
83418978 MF |
13 | struct ocfs2_extent_map_item { |
14 | unsigned int ei_cpos; | |
15 | unsigned int ei_phys; | |
16 | unsigned int ei_clusters; | |
17 | unsigned int ei_flags; | |
18 | ||
19 | struct list_head ei_list; | |
20 | }; | |
21 | ||
22 | #define OCFS2_MAX_EXTENT_MAP_ITEMS 3 | |
23 | struct ocfs2_extent_map { | |
24 | unsigned int em_num_items; | |
25 | struct list_head em_list; | |
26 | }; | |
27 | ||
28 | void ocfs2_extent_map_init(struct inode *inode); | |
29 | void ocfs2_extent_map_trunc(struct inode *inode, unsigned int cluster); | |
30 | void ocfs2_extent_map_insert_rec(struct inode *inode, | |
31 | struct ocfs2_extent_rec *rec); | |
32 | ||
9517bac6 | 33 | int ocfs2_get_clusters(struct inode *inode, u32 v_cluster, u32 *p_cluster, |
49cb8d2d | 34 | u32 *num_clusters, unsigned int *extent_flags); |
363041a5 | 35 | int ocfs2_extent_map_get_blocks(struct inode *inode, u64 v_blkno, u64 *p_blkno, |
4f902c37 | 36 | u64 *ret_count, unsigned int *extent_flags); |
ccd979bd | 37 | |
00dc417f MF |
38 | int ocfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
39 | u64 map_start, u64 map_len); | |
40 | ||
ac604d3c GH |
41 | int ocfs2_overwrite_io(struct inode *inode, struct buffer_head *di_bh, |
42 | u64 map_start, u64 map_len); | |
43 | ||
93862d5e SM |
44 | int ocfs2_seek_data_hole_offset(struct file *file, loff_t *offset, int origin); |
45 | ||
f56654c4 TM |
46 | int ocfs2_xattr_get_clusters(struct inode *inode, u32 v_cluster, |
47 | u32 *p_cluster, u32 *num_clusters, | |
1061f9c1 TM |
48 | struct ocfs2_extent_list *el, |
49 | unsigned int *extent_flags); | |
f56654c4 | 50 | |
a8549fb5 JB |
51 | int ocfs2_read_virt_blocks(struct inode *inode, u64 v_block, int nr, |
52 | struct buffer_head *bhs[], int flags, | |
53 | int (*validate)(struct super_block *sb, | |
54 | struct buffer_head *bh)); | |
e73a819d TM |
55 | int ocfs2_figure_hole_clusters(struct ocfs2_caching_info *ci, |
56 | struct ocfs2_extent_list *el, | |
57 | struct buffer_head *eb_bh, | |
58 | u32 v_cluster, | |
59 | u32 *num_clusters); | |
a8549fb5 JB |
60 | static inline int ocfs2_read_virt_block(struct inode *inode, u64 v_block, |
61 | struct buffer_head **bh, | |
62 | int (*validate)(struct super_block *sb, | |
63 | struct buffer_head *bh)) | |
64 | { | |
65 | int status = 0; | |
66 | ||
67 | if (bh == NULL) { | |
68 | printk("ocfs2: bh == NULL\n"); | |
69 | status = -EINVAL; | |
70 | goto bail; | |
71 | } | |
72 | ||
73 | status = ocfs2_read_virt_blocks(inode, v_block, 1, bh, 0, validate); | |
74 | ||
75 | bail: | |
76 | return status; | |
77 | } | |
78 | ||
79 | ||
ccd979bd | 80 | #endif /* _EXTENT_MAP_H */ |